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SE8604931L - FASTTILLSTANDSFORBINDELSELEDNINGSKRETS - Google Patents

FASTTILLSTANDSFORBINDELSELEDNINGSKRETS

Info

Publication number
SE8604931L
SE8604931L SE8604931A SE8604931A SE8604931L SE 8604931 L SE8604931 L SE 8604931L SE 8604931 A SE8604931 A SE 8604931A SE 8604931 A SE8604931 A SE 8604931A SE 8604931 L SE8604931 L SE 8604931L
Authority
SE
Sweden
Prior art keywords
trunk circuit
leads
coupling
circuitry
pair
Prior art date
Application number
SE8604931A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE8604931D0 (en
Inventor
Z B Styrna
D C Oddy
Original Assignee
Mitel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitel Corp filed Critical Mitel Corp
Publication of SE8604931D0 publication Critical patent/SE8604931D0/en
Publication of SE8604931L publication Critical patent/SE8604931L/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/0096—Trunk circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Multi-Conductor Connections (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Dc Digital Transmission (AREA)

Abstract

A trunk circuit is disclosed for coupling a bidirectional lead pair, such as balanced tip and ring leads, to a pair of unidirectional leads such as unbalanced input and output leads. The trunk circuit incorporates a small inexpensive transformer for effecting this coupling and for providing large common mode signal isolation and correct longitudinal balance. Circuitry is provided for matching the nominal balanced AC and DC line impedances. The trunk circuit also provides circuitry for generating dial pulse signals under control of a microprocessor or other external controller.
SE8604931A 1985-11-20 1986-11-18 FASTTILLSTANDSFORBINDELSELEDNINGSKRETS SE8604931L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA000495810A CA1240088A (en) 1985-11-20 1985-11-20 Solid state trunk circuit

Publications (2)

Publication Number Publication Date
SE8604931D0 SE8604931D0 (en) 1986-11-18
SE8604931L true SE8604931L (en) 1987-05-21

Family

ID=4131922

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8604931A SE8604931L (en) 1985-11-20 1986-11-18 FASTTILLSTANDSFORBINDELSELEDNINGSKRETS

Country Status (12)

Country Link
US (1) US4776007A (en)
JP (2) JPS62216490A (en)
CN (1) CN86107804A (en)
CA (1) CA1240088A (en)
DE (1) DE3621777A1 (en)
DK (1) DK552986A (en)
FI (1) FI864724A (en)
FR (1) FR2590430A1 (en)
GB (1) GB2183426B (en)
IT (1) IT1190031B (en)
NO (1) NO864632L (en)
SE (1) SE8604931L (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3804216A1 (en) * 1988-02-11 1989-08-24 Telefonbau & Normalzeit Gmbh CIRCUIT ARRANGEMENT FOR EXTERNAL LINE TRANSMISSION OF COMMUNICATION SWITCHING SYSTEMS, ESPECIALLY TELEPHONE EXTENSION SYSTEMS
US4894860A (en) * 1988-06-07 1990-01-16 Tie/Communications, Inc. Trunk interface circuitry for telephone systems
KR950012585B1 (en) * 1992-05-09 1995-10-19 삼성전자주식회사 Two-way dialing trunk interfacing circuit
US6480596B1 (en) * 1993-05-07 2002-11-12 Samsung Electronics Co., Ltd. Direct inward-outward dialing trunk circuit
US5517565A (en) * 1994-06-30 1996-05-14 Harris Corporation Integrated ringer relay circuit and method
DE4429840C2 (en) * 1994-08-23 1996-07-18 Ant Nachrichtentech Coilless simulation of a choke depending on the signal amplitude
GB2417393A (en) * 2004-08-18 2006-02-22 Mitel Networks Corp Central Office Line Circuit
JP2007180323A (en) * 2005-12-28 2007-07-12 Matsushita Electric Ind Co Ltd Manufacturing method of laminated ceramic capacitor and its selector
BR112014001467A2 (en) * 2011-07-25 2017-02-21 Koninklijke Philips Nv system for implementing dimming based on the signal from the solid state lighting module, and method for providing dimming based on the signal from a LED module
US9860392B2 (en) 2015-06-05 2018-01-02 Silicon Laboratories Inc. Direct-current to alternating-current power conversion

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3934099A (en) * 1974-08-16 1976-01-20 Bell Telephone Laboratories, Incorporated Bias, feedback and network arrangements for hybrid circuits
US3993880A (en) * 1976-02-09 1976-11-23 Bell Telephone Laboratories, Incorporated Resistive battery feed for line circuits
US4074087A (en) * 1976-08-16 1978-02-14 Bell Telephone Laboratories, Incorporated Bidirectional voice frequency repeater
US4126765A (en) * 1977-12-12 1978-11-21 Gte Automatic Electric Laboratories Incorporated Detector circuit for sensing battery polarity and loop closure
US4254305A (en) * 1979-02-07 1981-03-03 International Telephone And Telegraph Corporation Current limited subscriber line feed circuit
GB2071461B (en) * 1980-02-14 1984-01-25 Standard Telephones Cables Ltd Telephone line feed
DE3142201C2 (en) * 1981-01-23 1984-02-23 Mitel Corp., Kanata, Ontario Hybrid circuit for a telecommunication system, in particular a telephone system
JPS60125A (en) * 1983-06-15 1985-01-05 Fujitsu Ltd Two-wire four-wire conversion circuit
JPS6048693A (en) * 1983-08-29 1985-03-16 Toshiba Corp Central office line trunk circuit

Also Published As

Publication number Publication date
IT8620618A0 (en) 1986-05-30
DE3621777A1 (en) 1987-05-21
GB2183426B (en) 1989-10-11
DK552986A (en) 1987-05-21
IT1190031B (en) 1988-02-10
JPS62216490A (en) 1987-09-24
FR2590430A1 (en) 1987-05-22
US4776007A (en) 1988-10-04
GB8612353D0 (en) 1986-06-25
JPH0582185U (en) 1993-11-05
DE3621777C2 (en) 1988-04-07
CA1240088A (en) 1988-08-02
DK552986D0 (en) 1986-11-19
NO864632L (en) 1987-05-21
IT8620618A1 (en) 1987-11-30
CN86107804A (en) 1987-05-27
GB2183426A (en) 1987-06-03
NO864632D0 (en) 1986-11-20
FI864724A (en) 1987-05-21
SE8604931D0 (en) 1986-11-18
FI864724A0 (en) 1986-11-19

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Legal Events

Date Code Title Description
NAV Patent application has lapsed

Ref document number: 8604931-9

Effective date: 19900601